138474024 has 128 divisors (see below), whose sum is σ = 391372800. Its totient is φ = 40538880.

The previous prime is 138474023. The next prime is 138474031. The reversal of 138474024 is 420474831.

It is not an unprimeable number, because it can be changed into a prime (138474023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 996147 + ... + 996285.

It is an arithmetic number, because the mean of its divisors is an integer number (3057600).

Almost surely, 2^138474024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138474024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195686400).

138474024 is an abundant number, since it is smaller than the sum of its proper divisors (252898776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138474024 is a wasteful number, since it uses less digits than its factorization.

138474024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 138474024 is about 11767.4986297004. The cubic root of 138474024 is about 517.3559374017.

It can be divided in two parts, 13847 and 4024, that added together give a palindrome (17871).

The spelling of 138474024 in words is "one hundred thirty-eight million, four hundred seventy-four thousand, twenty-four".